Using RotationX to rotate Objects in Silverlight

In this tutorial we will rotate an image with a slider control. This is the 2nd tutorial of image transformations, the first tutorial ‘Scaling Objects with a Slider control in Silverlight’

Steps
1- Place an image on the stage
2- on the image add a PlaneProjection, this can easily be done by editing the Projection / Rotation / X in the properties panel
3- name RotationX to x:Name=”rotateX”
4- add a slider to the stage
5- name the slider x:Name=”rotateXSlider”
6- on the slider set ValueChanged=”changeRotateX”

View all parts of the tutorial
Part 1 – Scaling Objects with a Slider control in Silverlight
Part 2 – Using RotationX to rotate Objects in Silverlight
Part 3 – Using RotationY to rotate Objects in Silverlight



Use the Rotate X slider to rotate the image



XAML code

<Image Margin="49,-14,54,96" RenderTransformOrigin="0.5,0.5" Source="hulu.jpg" Stretch="Fill" d:LayoutOverrides="Width">
	<Image.Projection>
		<PlaneProjection x:Name="rotateX" RotationX="1"/>
	</Image.Projection>
</Image>
<Slider x:Name="rotateXSlider" Height="26" Margin="282,0,218,32" VerticalAlignment="Bottom"  Maximum="180" ValueChanged="changeRotateX" Style="{StaticResource SliderStyle1}"/>

C# code


private void changeRotateX(object sender, System.Windows.RoutedPropertyChangedEventArgs<double> e)
{
	rotateX.RotationX = rotateXSlider.Value;
	rotateX.RotationX = rotateXSlider.Value;
}

4 Responses to "Using RotationX to rotate Objects in Silverlight"

Hi Paul,

There’s something skewed in the application. Try this:
Zoom out the image fully and then do the RotateX. After this, House’s bottom image gets cut. On a typical RotateX, that should not happen. Let me know (http://twitter.com/nmarun53), if I’m seeing this the wrong way.

Arun

Hi Arun,

I tried your instructions on Firefox and IE and I cannot duplicate. Did you slide the rotate X all the way left and right? Can you post a screen shot of what you are seeing?

thanks,
Paul

See the screenshots:

http://twitpic.com/tf4gt
and
http://twitpic.com/tf4me

In the second image, see that House’s bottom image is getting cut.

Now that I’m thinking more about it, that is not an error, just a lil shift of coordinates.

Arun

Arun,

yes, you scaled the image larger than the Silverlight object, scaling the image down will bring the entire image back into view.

thanks for the screen shots, I appreciate it

Paul

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